Inspection cover and bulge top paper box



A ril 14, 1959 E. N. UPTONI- INSPECTION COVER AND BULGE TOP PAPER BOXOriginal Filed March 11, 1957 3 Sheets-She et 1 INVENTOR.

EVERETT N. UPTO/V Arm/m5).

April 14,1959 E. N.UPTON INSPECTION COVER AND BULGE TOP PAPER BOXOriginal Filed March 11, 1957 3 Sheets-Sheet 2 INVENTOR.

UP TO/V EVERETT A/.

ATTORNEY E. N. UP-TON 2,881,969

INSPECTION COVER AND BULGE TOP PAPER BOX Original Filed March 11, 1957April 14, 1959 3 Sheets-Sheet 3 INVENTOR. EVERETT IV. UPTON BY 2 vINSPECTIDN COVER AND BULGE TOP PAPER BOX Everett N. Upton, Hayward,Calif assignor to Container Corporation of America, Chicago, 11]., acorporation of Delaware Continuation of application Serial No. 645,080,March 11, 1957. This application December 23, 1957, Serial No. 704,783

23 Claims. (Cl. 229-43) This invention relates to paper board boxes withinspection cover and more particularly to such boxes adapted forselective use as a fiat-top or bulge-pack, and is a continuation of mycopending application Serial No. 645,080, filed March 11, 1957, entitledInspection Cover and Bulge Top Paper Box, now abandoned. In the socalledbulge-pack the box is filled to an elevation above the height of the endwalls and side walls, the invention herein having means to compensatefor such additional height effected by the bulging top. This type ofpacking box may be made of double-ply kraft paper with a corrugatedlayer therebetween and generally referred to as corrugated paper board.

Basically the so-called bulge-pack lug or crate is well known, meaningthereby that the container is filled to a height above the side walls,and in which the cover, usually slatted, is fastened to the ends of thecontainer and arched or bowed across the top of the contents. Suchcovers have usually been made of wooden slats nailed to the end walls ofthe box and cleats are then nailed transversely across the ends of theslats. Because of the pressure of the arched or bowed slats on theproduct, such boxes have not been acceptable for products which are moreor less subject to damage by pressure, such as grapes, tomatoes, headlettuce, cauliflower, and the like. While cleats at the ends of such boxcovers may compensate for the height of the bulge of the top insofar assuperimposed weight is concerned in stacking of such boxes, the cleatsdo not remove the pressure on the product which is inherent in thepressure of such arched or bowed slats. These and other ditficultieshave been present in endeavoring to make a satisfactory bulge-pack boxof paper board, such as the difliculty of holding or locking the sidewalls against bulging, and also providing suflicient lateral strength tostand the stress of so-called humping, which is lateral pressure againststacked boxes to prevent looseness in the stack. Furthermore, in makingshipments in boxes generally, the contents of random representativeboxes are inspected by opening the box to view of an inspector, thusrequiring either leaving the box open after inspection or renailing thecleats which hold the ends of the cover; also when the boxes finallyreach the retail merchant he usually inspects each box which hepurchases.

There are many highly desirable characteristics of such bulge type ofpacking, such as differential in freight rates and so-called bonusweights in buying and selling whereby a shipper pays freight or awholesale jobber buys and pays for packed boxes on the basis of therated size of the box, say 30- pounds, yet because of the bulge pack thecarrier may transport, or the jobber may actually receive, 32 or 33pounds of actual product. When the jobber sells to the retailer, hesells on the basis of actual poundage of contents, and if he hasreceived two or three poundsof bonus weight in both freight and product,it frequently represents the entire profit in a transaction. Thepractical advantages of an inspection cover and a bulge-pack box istherefore apparent from the commercial angle, and the advantages ofproviding such features in a foldable paper board box are evidenced bythe present trend toward use of paper board boxes generally.

Among the objects of the present invention are to provide a paper boardbox in which the contents may be readily inspected; to provide a paperboard box having reinforced end frames longitudinally and laterallylocked to the end walls and side walls; to provide a bulge-pack box inwhich the box including the bulged top or cover is made of paper boardintegral with side walls of the box and folded therefrom; to providesuch a box having reinforced ends and bottom; to provide a paper boardbox which facilitates inspection of contents; to provide for supportingweight of superimposed stacked boxes free of pressure on a bulge-topcover, and to improve generally upon inspection-type and bulge-packboxes of foldable paper board material.

With the foregoing and other objects in view as will more fully appearfrom the specification herein, a preferred form in which the inventionmay be exemplified is described herein and illustrated in theaccompanying drawings which are made a part hereof.

In the drawings:

Fig. 1 is a plan view of an inner blank from which the box of theinvention is formed;

Fig. 2 is a plan view of an outer blank from which the box of theinvention is formed;

Fig. 3 is an enlarged fragmentary view of a portion of Fig. 2;

Fig. 4 is a perspective view of a formed box of the invention inbulge-pack form;

Fig. 5 is a longitudinal vertical section on line 5--5 of Fig. 4;

Fig. 6 is a transverse lateral vertical section on line 6--6 of Fig. 4;

Fig. 7 is an enlarged fragmentary perspective view of a portion of thebox of Fig. 4;

Fig. 8 is an enlarged fragmentary perspective view of a portion of thebox structure of Fig. 7 illustrating formative position of parts;

Fig. 9 is an enlarged fragmentary vertical section on line 99 of Fig. 7;7

Fig. 10 is an enlarged fragmentary vertical section on line 1010 of Fig.4;

Fig. 11 is a perspective view of a frame member.

Fig. 12 is a perspective view of the box employed in a rectangular form,though having the same constructive elements as the box of Fig. 4.

Referring to the drawings in which like reference characters indicatecorresponding parts in the several views, it will be observed that thebox is comprised of a pair of substantially rectangular elongated blanksof suitable paper board sheet material, in which 10 indicates gener allyan integral box-forming blank designated as an outer blank, and 11indicates a box-forming blank generally designated as an inner blank,such designation being relative to the bottom wall of the formed box,since each blank also provides outer side or end walls. Each blank is anintegral series of panels. Though it would be practical to cut the areaof the blanks from a single planar sheet of paper board material, themaking of the body from a pair of panels has two advantages, firstly, itpermits overlying bottom panels to provide rigidity and strength to thebottom where the box is subject to the greatest stresses and roughesttreatment; secondly, it saves a large quantity of paper material, sinceif the panels were combined as a single unit and cut from a singlesheet, there would be a very substantial loss of material of thefour-corner portions of the material from which the blank is cut. Sincethe blanks are divided into panels by score 1ines,.it may be here notedthat reference herein to score; A

Patented Apr. 14, 1959 weakened by indentation for bending.

The outer blank has a preferably elongated bottom panel 12, the oppositetwo ends of which are free:

Integrally connected to the opposite longitudinal side" edges of thebottom panel, at the score'lines' 12a, arerelatively similarunits ofpanels, designated as'th'e side Wall panels 13, and the composite coverpanels 15, the latter being integrally connected to the opposite side oftheside Wall panels 13 at respective score lines 13a. Each'of the sidewall panels 13 has a relatively small rectangular elongated transversewing panel 17 at'each of its ends, the wing panels being foldableperpendicularly on score lines 17a. At one end, which may be termed theupper end in the formed box, each'of the end Wing panels is providedwith a locking ear or tab 19, bendable relative to the end wing on thescore line 19a.

The cover panels 15, being relatively similar, each comprises apluralityof sub-panels one of which may be termed a marginal cover panel 21 ineach cover panel. These marginal cover panels are substantiallyrectangular and-elongated. They are next adjacent to the side wallpanels 13 and have one longitudinal edge thereof connected to the sidewall panels by the score lines 13a. These panels 21 may serve a doublepurpose, depending on the manner in which the box is used. When the boxis employed for filling to the height of the side walls the entire coverpanels lie flatly across the top of thebox in the plane of the upperedge of the side walls, in which event the marginal cover panels 21' arehinge-base panels for inspection panels to be described. But when thebox is used for bulge-type packing, the box provides the additionalelevation of an upward bulge generally indicated A at the topof the box.At each end of the marginal hinge panels there is a triangular trustpanel 23, so designated because when the box is employed for a bulgepack, they truss the marginal hinge panel upwardly. The base of eachtruss panel is defined by the transverse score lines 23a which areperpendicular to the score line 13a, and the hypotenuse of thetriangular truss panels comprise the diagonal score lines 2317. At thebase ends of the triangle of each of the truss panels and connectedtransversely thereto at the score lines 23a, are cleat panels 25, sodesignated because they are received under a cleat member at theopposite ends of the box, as will be further described. These cleatpanels are elongated and substantially rectangular and also have one endcoinciding with and connected to the adjacent side wall panels at thescore lines 13a so that they bend on the score line 13a simultaneouslywith the marginal panels 21.

In the formed box, spacer tabs 27 underlie the cleat panels, and are ofsubstantially the same thickness as the paper board of which the coverpanels are made. Though these spacer members may be a separate member,preferably they are an integral panel connected at the free elongatededge of each of the cleat panels and bendable at score lines 2.5a, beingdesignated as spacer tabs or panels because they fold under the cleatpanels to space the latter from the end walls of the formed box forpurposes to be described.

At the longitudinal edge of each marginal hinge or bulge panel, beingthe edge thereof which is opposite to the connection of the side walls,said marginal hinge panels have connected thereto, by score lines 21a,elongated sight or inspection panels generally indicated 29, sodesignated because of their intended purpose. These inspection panelsprovide a planar portion of the cover which may be bent on score line21a whereby such inspection panels may be opened to inspect the contentsof' the box, either when they lie in a Hat plane or when at the elevatedplane formed by the upward incline of the marginal hinge or bulgepanels.

The inspection panels 29 are likewise subdivided into sub-panels;

It" will be noted that the connected score lines 21a are of lesserlength than the corresponding" edge of the marginal hinge panels,providing an integral bendable connection for only the longitudinalcentral planar portions 31 of the inspection panels. Each of thesecentral inspection panel portions 31 has at each of its opposite ends aninspection wing panel 33 'bendably connected to the central panelportion of score lines 31:: transversely of the central inspectionpanel, such end wing panels per se being separated from the marginalhinge panels by slots 35, whereby they are subject to independentbending on the score lines 31a.

The inspection wing panels have a transverse width substantially similarto the width of the central panel portion 31 though they may be slightlyoffset as at 37 as a minor convenience facilitating operation. The freeend edge of each inspection wing panel is characterized by a shaping tofacilitate employment of the inspection panel for its intended purposeof removability from and replacement under a cleat at the end of thebox. Such characteristic shaping is exemplified herein by providing, atthe end edges of each inspection wing, the stub fingers 39 preferablyrounded at the outer end to avoid sharp angles, and a substantiallyarcuate edge 41 for the remainder of the edge at the end of theinspection wing, thereby providing an outward end edge of the wing whichinclines from the base of the stub finger 39. For purposes to bedescribed, each of these inspection wings has a score line 33adiagonally thereacross, which is to facilitate a temporary bending ofthe stub corner of the plane of said wing, its precise position beingsomewhat optional so long as it extends across the Wing diagonally fromthe arcuate end edge 41 to the edge of slot 35.

It is here noted that when employed as a bulge-pack box the totaltransverse width of the two cover panels 15 may be made somewhat greaterthan the transverse width of the bottom panel 12, the additional widthbeing desirable because of the upward bulge of the cover panels. Whenemployed as a rectangular prism-type of box, but still maintaining theinspection feature of the described cover, the combined transverse widthof the cover panels 15 may overlap slightly at their confronting edgeswhen the box is closed as shown at B of Fig. 12, or the panels 29 may beslightly narrowed to equal the transverse width of the bottom panel 12.

The inner blank generally indicated 11 is an integral, elongatedrectangular sheet of the paper board material and comprises an innerbottom panel 50 of a length and width substantially equal to the similardimensions of the outer panel 12, since it lies substantiallycongruently thereover in the formed box. Adjacently spaced from itsopposite ends, bottom panel 50 has lock slots 51 which are parallel withsuch ends of the panel.

Connected at each of its opposite ends at score lines 50:: arerelatively similar double end wall panels, herein described withrelation to their position in the formed box, and comprising outeropposite end wall panels 53 and opposite inner end Wall panels 55, saidouter and inner wall panels being relatively spaced by relatively narrowspacer panels 57 defined by score lines 59 at each longitudinal sidethereof. The outer end Wall panels 53 each has substantially centrallyof its plane a slit 61 through the panel providing finger grip walls 63,bendable on the score lines 631:, said finger grip wall having a lockingtongue which, in the formed box, locks into a lock slot 65 which iscentrally of the area of the inner end Walls. Integral with the freeterminal end edge of each inner end panel are locking tongues 67relatively spaced to correspond with lock slots 51 and adapted to enterthereinto in the formed box.

Since the formed preferably may be provided with reinforced ends,rectangular supporting frames 69 are provided at'each end of the box, tobe enclosed between the relatively overlying end wall panels such aspanels 53 and 55-. Such supporting frames are best shown in Figs.

8 and 11. The frames are rectangular and dimensioned to'cor respond withthe dimensions of the inner end walls 55 since the frames are enclosedbetween the overlying panels of such end walls in the formed box. In thelongitudinal face at the upper edge of the frames there are transverserecesses 70 adjacently spaced from each end of the upper longitudinalcross-bar, which as will be explained, receive therein the locking tabs19.

A cleat member 71 may be employed for nailing transversely across eachend portion of the cover panels to close the box and to provide spacingbetween superposed boxes to accommodate the elevation of the bulge ofthe cover in bulge-pack boxes. Various openings 72, preferably slotted,may be provided in the several panels for the well-known purpose ofventilation, and where such ventilating openings are positioned inoverlying panels in the formed box, it seems manifest that such openingsshould register. In forming a box from the blanks as described, theinner blank 11 is placed over the outer blank at an angle of 90 degreesin a plane whereby the bottom panel 50 substantially congruentlyoverlies in facial contact with the opposed face of the outer bottompanel 12, an intervening layer of adhesive 73 securely bonding suchpanels together to provide a strong reinforced bottom wall. The endframes 69 are then placed transversely within the innerends of the'boxwith the recesses 70 upwardly, whereupon the side wall panels 13 arebent upwardly. on score lines 12a and simultaneously the wings of theside walls 17 are bent perpendicularly on score lines 17a and thelocking ears or tabs 19 are bent inwardly at a normal angle on scorelines 19a, such bending of panels providing a walled corner of the sidewall into which the riser members of the frames seat snugly; and sincethe frame recesses 70 are adjacently spaced at the ends of thelongitudinal crossbars of the frame, the looking cars 19 arebent intothese recesses and thereby lock the sidewalls at an upstanding positionand against outward spread. The next succeeding step is to bend inwardlyand lock the composite end panels 53, 55, 57. To accomplish this theouter end panels 53 are first bent upwardly upon the score lines 50a sothat the plane of the outer end panels overlie the plane of thepreviously installed frames, whereupon the inner end wall panels 55 arebent inwardly and downwardly on the score lines 59 of spacer panels 57,said spacer panels overlying the upper longitudinal cross-bar of frame69 and holding the locking cars 19 in the recesses of the frame. Whenthe inner panels of the end walls 55 have thus been folded into the box,the locking tongues 67 may be inserted in the lock slots 51 to lock saidend walls in position and enclose the frames therein.

The finger grip walls 63 may then be bent inwardly transversely of theplane of the frame and the double layer end walls, and the lockingtongues thereof may then be engaged in the lock slot 65 which not onlyreinforces the end walls in their central area, but also provide liftingsurface for finger grip and a wall to prevent all the stress of liftingor pulling the boxes from being exerted on the single outer layer of theend wall material. At this point of fabrication, the box is ready forfilling, the cover panels l 5 inot having been folded down over the boxand thereforebeing vertical in the plane of the upstanding side Walls13.,

H Assuming the box to have been filled, the spacer panels ortabs 27 arefolded inwardly on score lines 25a to underlie the cleat panels 25 atthe opposite ends of the marginalhinge bulge panels, whereupon thecomposite cover panels, may be closed upon the end walls by bending uponthe score lines 12a, the spacer tabs 27 intervening between the,coverpanels and the top of the end walls of the box and thus spacing thecleat panels 25 of the cover panels from the top of the end walls totheextent of the thickness of the spacer tabs 27.

. lf the. box is being employed forwhat may be termed an ordinary packwhich is not filled above the plane of the upper edge of the side andend walls as shown in Fig. 12, there may still be preserved thedesirable feature of the facility and use of the sight or inspectionpanels for inspecting the contents, in which type of use the entirecomposite cover panel 15 may then lay flatly across the top of the box,and any suitable holding cleats placed transversely across the endportions of the cover panels overlying the cleat panels 25 and spacerpanels 57 and the end walls of the box. The cleats are then nailed attheir ends through the ends of the so-called marginal hinge panels, andspecifically through the portions designated cleat panels 25 and thespacer tabs 27 thereunder, the underlying locking tabs 19, and into therecesses 70 of the cross-bar of the frame 69. In such use the samecleats as indicated 71 may be used, but the thickness of the cleats insuch use is not critically material, so long as they have practicalnecessary strength, since in this manner of use the cleats need notserve the purpose of spacer members to compensate for any additionalelevation at the top of the box, because the cover is not raised abovethe elevation of the upper edge of the sidewalls and end walls.

However, referring to the fact that the spacer tabs 27 are folded onlyunder that portion of the ends of the cover panels which is representedby the cleat panels 25 of the marginal hinge panels, it follows thatwhen the cleats 71 are nailed as aforesaid, there will be a slot orspace 75 under each cleat between the opposed ends of the spacer tabs 27at each end of the box. The free end edges of the wings 33 enter intothis space 75 under the cleats and are frictionally held thereunder. Inentering the end of the wings in the space 75 under the cleats, the stubfingers 39 are entered first. In doing this the adjacent corner portionof the wing panels is bent upon the diagonal scorelines 3311 in order toinsert the stub finger into the space under the edge of the cleats,whereupon the inclined edges of the arcs 41 of wings 33 engage thelongitudinal edge of the cleats, at the space 75, and upon downwardpressure centrally of the inspection panels the said inclined edges rideupon the edge of the cleats and snap the entire end edge portion of thewing panels 33 into the spaces 75 and underlying the cleats.

In order to inspect the contents, the inspection panels may be raised topull the ends of the inspection panels free of the slots 75 whereuponthe contents of the box are viewable, and after inspection the box maybe closed again by inserting the wing ends under the cleats in the samemanner as the above described closing operation.

The foregoing description of the closing operation is employed when thebulge-pack facility is not employed in filling the boxes. When thebulge-pack facility is utilized in filling the boxes, the panels are thesame and the operation of closing is basically similar but, additionalscore lines are employed in the operation.

The upper line of the bulge-pack contents is illustrated in Fig. 6 at 71from which it will be noted that the upper surface of the contents iselevated above the upper edge of the side Walls and end walls of thebox. Thus, if the cover panels 15 were in a straight unbendable planethey would, when bent inward on the score lines 13a extend along thedotted lines 77 of Fig. 6. But, by reason of the so-called compositeinspection panels 29 being bendable on score lines 21a with relation tothe so-called marginal hinge or bulge panels 21, the marginal hingepanels may incline upwardly to an elevation commensurate with the toplevel of the packed contents, and the inspection panels 29 being thenbent on score lines 21a may extend in an elevated plane across theopening remaining between the opposed marginal hinge panels.

Were it not for additional scored bending lines in the cover panels 15as will be further described, the upward incline of the marginal hingepanels would leave the opposite ends of the cover panels 21 and 29projecting in spaced relation above the end walls, and further, therewould be no means for maintaining the bulge panels in- 7 clined,upwardly, other than the pressure thereof onthe elevated. top of thecontents of the box, the prevention .of which is one of the objects ofthe invention. Wherefore, there are provided the triangular truss panels23 at the op posite ends of the marginal hinge panels, such truss panelsbeing bendable at an incline downwardly on diagonal score lines 2312. Atthis point it is to be noted that the cleat panels 25 are at the baseline of the triangular truss panels and are bendable on said base scorelines 23a to a plane parallel and overlying the end walls of the box,and superficially contacting the spacer panels or tabs 27. Thus, a fiatplanar area is provided by the cleat panels overlying the end Walls ofthe box for receiving thereupon the nailed cleats 71. When the cleatpanels are nailed they furnish a rigid base line from which thetriangular truss panels incline upwardly and support the marginal hingepanel at its elevated or bulged position. In such bulge-pack use of thebox the elongated slots 75 underlying the cleats are open between theopposed ends of the spacer panels at the end of the box in the samemanner as previously described. But as thus far described in thebulge-pack use of the box, the inspection panels 29, though bent at anangle on score lines 21a to parallel the plane of the bottom, arenevertheless elevated above the height of the end walls of the slots bythe upward incline or the so-called bulge, of the marginal hinge panels.Therefore, means are provided to lower the ends of the end wing portions33 of the inspection panels so that the end edges. thereof may beinserted into the slots 75 in the manner previously described. Since theslots 35 permit manipulation of the wing panels 33 independently of themarginal hinge or bulge panels, the score lines 31a provide for bendingthe wing panels 33 downwardly to the plane of the slots 75, whereuponthe end edge portion comprising stub 39 and edge 41 may be selectivelyinserted into and removed from slot 75 in the same manner as previouslydescribed.

In employing the box as a bulge-pack box, the end cleats 71 shouldmanifestly be of such thickness in height as to slightly more thancompensate for the additional elevation of the cover panels into theupward incline of the marginal hinge or bulge-pack panels, in order thatthe cleats and end walls may support the load of super posed boxeswithout pressure on the planar central portion of the upwardly elevatedor bulged cover, as shown in Fig. 5.

It has previously been stated that the spacer member 27 may be aseparate member. Therefore, it will further be observed that the box maybe employed as a bulge pack type of box without employing the feature orfacility of the inspection cover. In such use, it would not be necessaryto have the free end of the inspection wing panels readily removable andinsertable under the cleats, nor for the cleats to be spaced above theend Walls by a double thickness of the board material, such as isprovided at space 75 formed by the thickness of the cleat panels 25 plusthe thickness of the spacer members 27. In such use the spacer members27 may, if desired, be eliminated entirely, in which event the cleatswould be spaced from the top of, the end walls solely by the singlelayer or thickness of the cleat panels 25, and the remaining panels ofthe bulge pack type of box employed in the same manner and with the samerelationship as shown in Fig. 4, the cleats 71 being in directtightlysecured pressure contact with the cleat panels 25 and theterminal free end portions of the wing panels 33, and being nailedtherethrough.

Having thus described the invention what is claimed as new and.patentable is:

1. A foldable paper box of relatively bendable panels comprising abottom panel, oppositely disposed side walls, opposite end walls, acover panel bendably connected to each of the side walls, said coverpanels including'a marginal cover panel next adjoining and bendableconnected at one edge to a side wall, a spacer member for underlying-theends of the marginal cover panels and spacing the ends of said panelsfrom the upper-face of the end walls whereby a cleat may be disposedacross the top of each of the end walls and provide a space thereunder,an inspection cover panel bendably connected at the opposite edge ofeach of said marginal cover panels, inspection wing panels at theopposite ends of the inspection cover panels and independently bendabletransversely of the inspection cover panels, whereby the free end edgeof the inspection wing panels may slide under a cleat in the spaceprovided by the spacer members.

2. A paper board box of the character described as set forth in claim 1,the spacer members being of a thickness substantially similar to thethickness of the cover panels.

3. A paper board box as set forth in claim 1 and in which the oppositeend Walls each comprise spaced inner and outer panels having frame endsupport members between said end wall panels.

4. A paper board box as set forth in claim 1, the bottom panel includinga pair of overlying substantially congruent bottom panels securelyconnected relatively.

5. A paper board box of the character described as set forth in claim I,and in which the side walls each has a wing at its opposite end bendableperpendicularly at the ends of the side walls, said end wings havinglocking tabs at one end foldable to parallel the bottom panels, and inwhich the opposite end walls each comprise spaced inner and outer panelshaving frame end support members between said end wall panels eachsupport member having at its upper edge a transverse recess forreceiving therein the locking tabs of the side wall wings.

6. A paper board box as set forth in claim 1, the inspection Wing panelseach having a lead corner portion provided with stub finger at aterminal corner for initially entering said space which overlies the endwalls.

7. A box of relatively bendable paper board panels as set forth in claim1, said box comprising a pair of boxforming substantially rectangularblank members each having a bottom panel, said bottom panels beingadapted for overlying congruently, and in which the side walls arebendably connected to opposite edges of the bottom panel of one of saidblank members, and in which the end walls are bendably connected toopposite edges of the bottom panel of the other of said blank members,

8. A box of relatively bendable paper board panels. including bottompanel, oppositely disposed side walls, opposite end walls, a cover panelbendably connected to; each of the side walls, said cover panelsincluding a.

marginal cover panel next adjoining and bendably connected at one edgeto a side wall, a cleat panel at each end of the marginal cover panels,said cleat panels over,-

lying the end walls of the box when the cover panels are bent to closethe box, a truss panel at each opposite end portion of the marginalcover panels, a spacer memberfor underlying the cleat panels at each endof the box spacing the cleat panels from the upper face of the end wallswhereby a cleat may be nailed across the top of the end walls andprovide a space thereunder, an inspection.

cover panel bendably connected at the opposite edge of said marginalcover panels, inspection wing panels at the opposite ends of theinspection cover panels and inde-. pendently bendable transversely ofthe inspection cover panels whereby the free end edge of the inspectionwing panels may slide under a cleat in the space provided by the spacermembers.

9. A foldable paper box of relatively bendable panels as set forth inclaim 8, the truss panels being a triangular portion adjacent the endsof the marginal cover panels, and the cleat panels being at the base ofthe triangular truss panels.

10. A paper board box of the character described set forth in claim 8,the spacer members being of a thickness substantially similar to thethickness of the cover panels.

11. A box of relatively bendable paper board panels as set forth inclaim 8, the bottom panel including a pair of overlying substantiallycongruent bottom panel members securely connected relatively.

12. A paper board box as set forth in claim 8, and in which the oppositeend walls each comprise spaced inner and outer panels having frame endsupport members be tween said end wall panels.

13. A box of relatively bendable paper board panels as set forth inclaim 8, and in which the side walls each have a wing at opposite endsthereof bendable perpendicularly at the ends of the side walls, said endwings having locking tabs at one end foldable to parallel the bottom,and in which the opposite end walls each comprise spaced inner and outerpanels having frame end support members between said end walls eachsupport member having at its upper edge a transverse recess forreceiving therein the locking tabs of the side wall Wings.

14. A paper board box of the character described as set forth in claim8, the inspection wing panels each having a lead corner portion providedwith a stub finger at a terminal corner for initially entering saidspace which overlies the end walls.

15. A box of relatively bendable paper board panels as set forth inclaim 8, said box comprising a pair of box forming substantiallyrectangular blank members each having a bottom panel, said bottom panelsbeing adapted for overlying congrucntly, and in which the side walls arebendably connected to opposite edges of the bottom panel of one of saidblank members, and the end walls are bendably connected to oppositeedges of the bottom panel of the other of said blank members.

16. A box of relatively bendable paper board panels including a bottompanel, oppositely disposed side walls,

opposite end walls, a cover panel bendably connected to each of the sidewalls, said cover panels including a marginal cover panel portion nextadjoining and bendably connected at one edge to a side wall, a cleatpanel at each end of the marginal cover panel, said cleat panelsoverlying the end walls of the box when the cover panels are bent toclose the box, a triangular truss panel at each opposite end portion ofthe marginal cover panels, the truss panels being between the marginalcover panels and the cleat panels whereby the marginal cover panels maybe maintained at an upward-inward incline from the plane of the top ofthe side walls and the end walls, said marginal cover panels having atthe opposite longitudinal edge thereof another integral cover panelportion which has at its opposite ends bendably connected wingsseparated from the marginal cover panel portion by a slit, said coverwing portions being bendable downwardly so that the free ends thereofcontact the top of the end wall of the box, whereby a cleat may benailed across the top of the end walls and secure the cleat panels andthe terminal ends of the said cover wing panels securely to the top faceof the end walls of the box.

17. A box of relatively bendable paper board panels as set forth inclaim 16, the bottom panel including a pair of overlying substantiallycongruent bottom panel members securely connected relatively.

18. A paper board box as set forth in claim 16 and in which the oppositeend walls each comprise spaced inner and outer panels having frame endsupport members between said end wall panels.

19. A box of relatively bendable paper board panels as set forth inclaim 16 and in which the side walls each have a wing at opposite endsthereof bendable perpendicularly at the end of the side walls, said endwings having locking tabs at one end thereof foldable to parallel thebottom, and in which the opposite end walls each comprise spaced innerand outer panels having frame end support members between said end wallpanels each support mem- 10 ber having at its upper edge a transverserecess for receiving therein the locking tabs of the side wall Wings.

20. A box of relatively bendable paper board panels as set forth inclaim 16, said box comprising a pair of box-forming substantiallyrectangular blank members each having a bottom panel, said bottom panelsbeing adapted for overlying congruently, and in which the side walls arebendably connected to opposite edges of the bottom panel of one of saidblank members and the end walls are bendably connected to opposite edgesof the bottom panel of the other of said blank members.

21. A foldable paper box comprising a bottom panel, oppositely disposedside walls, opposite end walls each formed to provide a slot adjacentthe upper edge thereof, a cover panel bendably connected to each of theside walls, said cover panels including a marginal cover panel nextadjoining and bendably connected at one edge to a side wall, a trusspanel at each opposite end portion of the marginal cover panel, meanssecuring said truss panel to the adjacent side wall, an inspection coverpanel bendably connected at the opposite edge of each of said marginalcover panels and inspection wing panels at the opposite ends of theinspection cover panels independently bendable transversely of theinspection cover panels, whereby the free end edge of the inspectionwing panels may slide into the respective end wall slots.

22. A foldable paper box of relatively bendable panels comprising abottom panel, oppositely disposed side walls, opposite end walls, acover panel bendably connected to each of the side walls, said coverpanels including a marginal cover panel next adjoining and bendablyconnected at one edge to a side wall, the ends of said marginal coverpanels overlying the upper face of the end walls, a spacer member forunderlying the ends of the marginal cover panels and spacing the ends ofsaid panels from the upper face of the end Walls whereby means may bedisposed across the top of each of the end walls and provide a slottherethrough, an inspection cover panel bendably connected at theopposite edge of each of said marginal cover panels, inspection wingpanels at the opposite ends of the inspection cover panels andindependently bendable transversely of the inspection cover panels,whereby the free end edge of the inspection wing panels may slide intothe respective end wall slots.

23. A foldable paper box comprising a bottom panel, oppositely disposedside walls, opposite end walls, a cover panel bendably connected to eachof the side walls, said cover panels including a marginal cover panelnext adjoining and bendably connected at one edge to a side wall, theends of said marginal cover panels overlying the upper face of the endwalls, cleat means securing said ends of the marginal cover panels tothe end walls, said cleat means disposed across the top of each of theend walls whereby to provide a slot therethrough, an inspection coverpanel bendably connected at the opposite edge of each of said marginalcover panels, and inspection wing panels at the opposite ends of theinspection cover panels independently bendable transversely of theinspection cover panels, whereby the free end edge of the inspectionwing panels may slide into the respective end wall slots.

References Cited in the file of this patent UNITED STATES PATENTS2,044,301 Hill June 16, 1936 2,134,051 Kirby Oct. 25, 1938 2,285,873Roberts June 9, 1942 2,712,894 Paxton July 12, 1955 2,727,675 Mairs eta1. Dec. 20, 1955

